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/** |
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* Click empty canvas padding to deselect (core's padding appender eats the event |
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* and would insert `core/paragraph`, which we disallow). Deselect only. |
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*/ |
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import { store as blockEditorStore } from '@wordpress/block-editor'; |
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import { select as dataSelect, useDispatch, useSelect } from '@wordpress/data'; |
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import { useEffect } from '@wordpress/element'; |
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import { registerPlugin } from '@wordpress/plugins'; |
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|
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const PB_CPTS = [ 'wppb-rf-cpt', 'wppb-epf-cpt' ]; |
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|
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/** |
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* True when the click hit canvas empty space (styles wrapper, or `<html>` in iframe). |
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* |
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* @param {EventTarget} target |
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* @return {boolean} |
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*/ |
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const isCanvasEmptySpace = ( target ) => { |
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const doc = target && target.ownerDocument; |
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if ( ! doc ) return false; |
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|
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const wrapper = doc.querySelector( '.editor-styles-wrapper' ); |
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if ( ! wrapper ) return false; |
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if ( target === wrapper ) return true; |
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|
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// Only when the canvas is iframed: there, `<html>` is part of the canvas. |
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// In the non-iframed fallback the wrapper is a plain div and everything |
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// outside it is editor chrome, which must not deselect. |
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return wrapper === doc.body && target === doc.documentElement; |
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}; |
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|
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const CanvasPaddingDeselect = () => { |
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const postType = useSelect( ( select ) => select( 'core/editor' ).getCurrentPostType(), [] ); |
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const isOurPostType = PB_CPTS.includes( postType ); |
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|
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const { clearSelectedBlock } = useDispatch( blockEditorStore ); |
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|
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useEffect( () => { |
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if ( ! isOurPostType ) return undefined; |
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|
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const onPointerDown = ( event ) => { |
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// Primary button only — a right-click opens a context menu and |
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// shouldn't move the selection. |
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if ( event.button !== 0 ) return; |
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if ( ! isCanvasEmptySpace( event.target ) ) return; |
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|
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const editor = dataSelect( blockEditorStore ); |
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if ( ! editor.getSelectedBlockClientId() && ! editor.hasMultiSelection() ) return; |
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|
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clearSelectedBlock(); |
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|
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// Clearing the store isn't enough: the same `preventDefault()` also |
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// cancels the browser's focus shift, and core paints a selection |
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// outline off `:focus` alone, so the field would still LOOK selected. |
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// `blur()` hands focus to the canvas `<body>` — where a click on the |
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// canvas' sides leaves it anyway. |
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const doc = event.target.ownerDocument; |
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const active = doc.activeElement; |
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if ( active && active !== doc.body && typeof active.blur === 'function' ) { |
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active.blur(); |
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} |
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}; |
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|
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let attachedDoc = null; |
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let frame = 0; |
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|
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const sync = () => { |
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const iframe = document.querySelector( 'iframe[name="editor-canvas"]' ); |
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// `document` fallback covers a non-iframed canvas (device preview / |
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// older Gutenberg), as in RootCanvasAppender. |
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const doc = iframe ? iframe.contentDocument : document; |
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if ( doc === attachedDoc ) return; |
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|
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if ( attachedDoc ) { |
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attachedDoc.removeEventListener( 'pointerdown', onPointerDown, true ); |
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} |
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attachedDoc = doc; |
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if ( doc ) { |
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doc.addEventListener( 'pointerdown', onPointerDown, true ); |
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} |
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}; |
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|
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const schedule = () => { |
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if ( frame ) return; |
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frame = window.requestAnimationFrame( () => { |
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frame = 0; |
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sync(); |
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} ); |
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}; |
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|
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sync(); |
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// The canvas iframe is recreated on device-preview switches, which |
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// replaces the document we're attached to. |
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const observer = new MutationObserver( schedule ); |
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observer.observe( document.body, { childList: true, subtree: true } ); |
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|
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return () => { |
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observer.disconnect(); |
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if ( frame ) window.cancelAnimationFrame( frame ); |
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if ( attachedDoc ) { |
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attachedDoc.removeEventListener( 'pointerdown', onPointerDown, true ); |
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} |
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}; |
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}, [ isOurPostType, clearSelectedBlock ] ); |
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|
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return null; |
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}; |
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|
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registerPlugin( 'wppb-fb-canvas-padding-deselect', { render: CanvasPaddingDeselect } ); |
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|
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export default CanvasPaddingDeselect; |
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